X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Ffread.c;h=d1afc99be3016a720a7d2311e45f8315eaeaeaad;hb=b1fc26afebd4d557ff89a44bc21767a8704c3809;hp=b77b5dd4724d700dafdc2a242793bb8f047a705e;hpb=393020b6e48719d27699dea6b29e53025bbd5123;p=pdclib

diff --git a/functions/stdio/fread.c b/functions/stdio/fread.c
index b77b5dd..d1afc99 100644
--- a/functions/stdio/fread.c
+++ b/functions/stdio/fread.c
@@ -1,5 +1,3 @@
-/* $Id$ */
-
 /* fwrite( void *, size_t, size_t, FILE * )
 
    This file is part of the Public Domain C Library (PDCLib).
@@ -7,10 +5,11 @@
 */
 
 #include <stdio.h>
-#include <_PDCLIB_glue.h>
 
 #ifndef REGTEST
 
+#include <_PDCLIB_glue.h>
+
 #include <stdbool.h>
 #include <string.h>
 
@@ -48,12 +47,34 @@ size_t fread( void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, struct _PD
 int main( void )
 {
     FILE * fh;
-    remove( "testfile" );
-    TESTCASE( ( fh = fopen( "testfile", "w" ) ) != NULL );
-    TESTCASE( fwrite( "SUCCESS testing fwrite()\n", 1, 25, fh ) == 25 );
+    char const * message = "Testing fwrite()...\n";
+    char buffer[21];
+    buffer[20] = 'x';
+    TESTCASE( ( fh = tmpfile() ) != NULL );
+    /* fwrite() / readback */
+    TESTCASE( fwrite( message, 1, 20, fh ) == 20 );
+    rewind( fh );
+    TESTCASE( fread( buffer, 1, 20, fh ) == 20 );
+    TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+    TESTCASE( buffer[20] == 'x' );
+    /* same, different nmemb / size settings */
+    rewind( fh );
+    TESTCASE( memset( buffer, '\0', 20 ) == buffer );
+    TESTCASE( fwrite( message, 5, 4, fh ) == 4 );
+    rewind( fh );
+    TESTCASE( fread( buffer, 5, 4, fh ) == 4 );
+    TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+    TESTCASE( buffer[20] == 'x' );
+    /* same... */
+    rewind( fh );
+    TESTCASE( memset( buffer, '\0', 20 ) == buffer );
+    TESTCASE( fwrite( message, 20, 1, fh ) == 1 );
+    rewind( fh );
+    TESTCASE( fread( buffer, 20, 1, fh ) == 1 );
+    TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+    TESTCASE( buffer[20] == 'x' );
+    /* Done. */
     TESTCASE( fclose( fh ) == 0 );
-    /* TODO: Add readback test. */
-    TESTCASE( remove( "testfile" ) == 0 );
     return TEST_RESULTS;
 }